Speed-timing device for cream-separators and the like.



K STEWART. SPEED TIMING DEVIGE FOB CREAM SEPARATORS AND THE LIKE.

APPLIGATION FILED MAY 26, 1909.

Patented June 13, 1911.

UNITED STATES PATENT onrrcn.

JOHN K. STEWART, OF CHICAGO, ILLINOIS.

SPEED-TIMING DEVICE FOR CREAM-SEPARATORS AND THE LIKE.

Specification of Letters Patent. Patented June 13, 1911.

1909. Serial No. 498,522.

Application filed May 26,

To all whom it may concern:

Be it known that I, JoHN K. STEWART, a citizen of the United. States, residin at Chicago, in the county of Cook and state of Illinois, have invented new and useful Improvements in Speed-Timing Devices for Cream-Separators and the Li e, of which the following is a specification, reference being had to the drawings forming a part thereof.

The purpose of this invention is to provation of the operating shaft of a cream separator and its bearing, having mounted upon it a device embodying this invention.

Fig. 2 is a section at'the line 2 -4. on Fig. 1'.

Fig. 3 is a detail plan view of the same.

Fig. 4 is a face view of a modified form'of" indicating dials and index hands.

In the drawings, A is the operating shaft of the separator or other mechanism whose speed is to be indicated by the device of this invention. 4

B is a bearing for the shaft, A.

Ois a crank handle by which the shaft may be rotated by hand. On the shaft, A, between the bearing and the .crank there ismade fast a worm sleeve, D, and on said shaft there is loosely mounted a hanger, E, stopped against rotation by the stop finger, E engaging thebe'aring, D, such hanger having journaled in it a worm gear, F, meshing with the worm of the worm sleeve, D. On the hanger, which is suitably extended at E for the purpose, there is mounted the case or frame, G, of a clock movement, conventionally indicated by the gear traln, H, of such movement, having a minute-hand staff,'J, which is hollow and co-axlal with the worm gear, F, from which as indle, K, extends through the hollow sha t, both said hollow shaft and spindle belng extended through the dial plate, 0 of the clock case, C, and preferably graduated forseconds and fractions of seconds, as illustrated. The clock movement may be devoid of any means for operating the hour hand, and the dial may be clear of an hour indications. The hollow shaft, J, as an index hand, M, and the spindle K, has an index hand, N.. One of said hands, and

the hollow shaft,-as indicated b the sleeve hub, M ,so that it can be rea il turned thereabout to coincide with the in ex hand, N, on the other shaft.

crating to rotate the minute hand, M, the operator, upon commencing the rotatlon of the shaft,*A, by means of the crank handle will set the two hands, M and N, coincident,

as many revolutions per minute as there are teeth on the worm gear, F, the two The device will be constructed with a worm proper operation of the machine. The do I vice being especiallyintended forsuch mechanismps cream separators, which areconf'structe'dfor certain speed, there will be no necessity, so far as this device is concerned, for making the worm gear,'F, interchangeable with others. Instead of marking the machine with the number of revolutions per minute at which it should be operated, the operator will be instructed merely to keep the two hands, M and N, coincident or uniformly spaced during operation, thus insuring the precise speed for which the machine is constructed. The initial setting of the two hands, M and N, coincident will be a matter of preference or convenience only,-as the operator will readil bring them into coincidence in the first llalf minute of the operation of the shaft; or, obviously, the result of uniformity of rotation at the desired speed will be attained by maintaining their distance apart uniform by the speed given the shaft.

There may be substituted for the index hand, N, a graduated dial, n, which may also have a projecting finger, n for indicating angular change of position on the dial, C or which may be without such indlcating finger. The dial, a, is preferably graduated both which the index finger, n is located, if present, so that the departure of the zero point or hand, W, of the dial, n, from the most conveniently the hand, M, on the larger I of the two shafts, is frictionally mounted onor whatever other means may be providd,

hands, M and N, will remain coincident.-

The clock movement being wound and op' I and so long as he gives the crank shaft, A,

gear, F, having as many teeth as'the number. of revolutions per minute suitable forthe ways from a zero point at in the hanger; a chronometer movement mounted on the hanger having a minute an index hand on such spindle, the two hands being mounted in position to besimultaneously visible for comparison of their rotation.

2. A speed-indicating device for operating shafts comprising, in combination with the shaft to be indicated, a worm fast on the shaft; a hanger loose on the shaft; a Worm gear and a chronometer movement mounted on the hanger, the minute-hand staff of the chronometer movement being co-axial with the worm gear and being hollow, the worm gear having a s indle extending through said hollow stafi, said staff and spindle being each provided with an index hand and mounted 1n osition for exposing both said hands to view during their rotation;

3. A speed indicatorfor operating shafts com rising in combination with the shaft to e indicated, a hanger loose on such shaft; a chronometer movement mounted on the'hanger having a hollow hand staif and a time-indicating hand on such staff; a spin dle extending through such hollow shaft and an index hand thereon, and means for rotating said spindle from the operating shaft to be indicated, said two hands being mounted in position to be simultaneously visible for comparison of their rotation.

4. A speed indicator for operating shafts comprising, in combination with the shaft to be indicated, a hanger loose on the shaft and stopped against rotation therewith; a chronometer movement mounted on the hanger comprising a. hand staff and a timeindicating hand on said staff another hand staff coaxial with said time-indicating staff, and means for rotating it from the shaft to be indicated, said two hand stafl's being co-axial, and one of them being hollow and having the other extending through it, the two hands being mounted on their respective staffs in position to be simultaneously visible for comparison of their rotation.

In testimony whereof, I have hereunto set my hand, at Chicago, Illinois, this Qatth day of May, 1909.

JOHN K. STEWART.

Witnesses:

J. S. ABBOTT, M. GERTRUDE ADY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

